220229221 has 2 divisors, whose sum is σ = 220229222. Its totient is φ = 220229220.

The previous prime is 220229197. The next prime is 220229227. The reversal of 220229221 is 122922022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130188100 + 90041121 = 11410^2 + 9489^2 .

It is a cyclic number.

It is not a de Polignac number, because 220229221 - 2⁵ = 220229189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220229192 and 220229201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220229227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110114610 + 110114611.

It is an arithmetic number, because the mean of its divisors is an integer number (110114611).

Almost surely, 2^220229221 is an apocalyptic number.

It is an amenable number.

220229221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220229221 is an equidigital number, since it uses as much as digits as its factorization.

220229221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 220229221 is about 14840.1220008462. The cubic root of 220229221 is about 603.8906620865.

It can be divided in two parts, 220 and 229221, that added together give a square (229441 = 479²).

The spelling of 220229221 in words is "two hundred twenty million, two hundred twenty-nine thousand, two hundred twenty-one".